Former presidential candidate Ralph Nader discussed the possibility of billionaire candidates running for president during a Monday appearance on CSPAN, predicting that a wealthy third-party candidate will emerge in the next presidential race.

"We'll have the usual Green Party and libertarian parties in 2016," Nader said. "But there are some mega-billionaires who are seriously considering running third party."

Nader noted that all wealthy candidates needed to do to fund their campaigns is "write a check for themselves," citing New York City Mayor Michael Bloomberg as a potential example.

"When someone like Mr. Bloomberg’s worth $27 billion, to write a $500 million check and not have to dial for dollars, not have to be beholden, tends to be attractive to a lot of voters," Nader said.